oslo.db should >= 1.4.0

[stanzgy]

designate: 6b75da0#master (2015-01-14 23:39:30 +0000)

My devstack designate-manage command broken that lacks subcommand powerdns, pool-manager-cache and database.
Tried reinstall designate but not worked.

$ sudo designate-manage
usage: designate [-h] [--config-dir DIR] [--config-file PATH] [--debug]
                 [--log-config-append PATH] [--log-date-format DATE_FORMAT]
                 [--log-dir LOG_DIR] [--log-file PATH] [--log-format FORMAT]
                 [--nouse-syslog] [--nouse-syslog-rfc-format] [--noverbose]
                 [--syslog-log-facility SYSLOG_LOG_FACILITY] [--use-syslog]
                 [--use-syslog-rfc-format] [--verbose] [--version] [--nodebug]
                 {tlds} ...
designate: error: too few arguments

After a debug with ipdb, I found this is due to commit c6a7cbb which moves oslo.db out of "oslo" namespace but not updates the version of oslo.db.
My devstack has already installed the 1.3.0 oslo.db which matches the requirements.txt will not get upgraded during reinstalling designate.
When I manually installed lastest 1.4.1 oslo.db, designate-manage works good.

ipdb result:
...
> /usr/local/lib/python2.7/dist-packages/stevedore/extension.py(157)_load_plugins()
    156 LOG.debug('found extension %r', ep)
--> 157 try:
    158 ext = self._load_one_plugin(ep,

ipdb> ep
EntryPoint.parse('powerdns = designate.manage.powerdns:DatabaseCommands')
...
> /usr/local/lib/python2.7/dist-packages/stevedore/extension.py(162)_load_plugins()
    161 invoke_kwds,
--> 162 verify_requirements,
    163 )

ipdb>
ImportError: 'No module named oslo_db.sqlalchemy.migration_cli'

requirement.txt
oslo.db>=1.3.0 # Apache-2.0

oslo.db release notes:
1.4.0:
...
Move files out of the namespace package

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/147407

[OpenStack Infra (hudson-openstack)]

Change abandoned by stanzgy (<email address hidden>) on branch: master
Review: https://review.openstack.org/147407

[Kiall Mac Innes (kiall)]

Fixed in https://review.openstack.org/#/c/148628/